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What do diamonds and pencil lead have in common?

“Diamonds and graphite, the "lead" in pencils, are both made entirely of carbon. The only difference is how their atoms are arranged.”

Reference: Royal Society of Chemistry

What saturation of sulfur dioxide will cause people to cough

Sulfur dioxide is a colorless gas with a suffocating, choking odor. It is toxic to humans and concentrations as low as 8 ppm will produce coughing. Incredibly, in the Odyssey, Homer describes the burning of sulfur (formation of SO2) as a way that homes were 'fumigated'.

Is there lead in a pencil?

Pencil "lead" doesn't contain any lead. It's made of graphite, a form of carbon, mixed with clay.

Where do diamonds form?

Most natural diamonds form about 100 miles below Earth's surface under extreme heat and pressure.

Another fact

“Diamonds and graphite, the "lead" in pencils, are both made entirely of carbon. The only difference is how their atoms are arranged.”

More from this shelf

What saturation of sulfur dioxide will cause people to cough

Is there lead in a pencil?

Where do diamonds form?